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Finding the Fourth Proportional to 1,347.63, 2,021.44 and 435.63

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Solution

The fourth proportional to 1,347.63, 2,021.44 and 435.63 is: 653.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.63 : 2,021.44 = 435.63 : x
  2. Step 2: Convert to fraction form
    1,347.63/2,021.44 = 435.63/x
  3. Step 3: Cross multiply
    1,347.63x = 2,021.44 × 435.63
  4. Step 4: Simplify right side
    1,347.63x = 880,599.91
  5. Step 5: Solve for x
    x = 880,599.91/1,347.63
  6. Step 6: Final answer
    x = 653.44

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.